An 'analog' device that aliases. Too bad us laymen lack the tools and the skills to really dive in and see how the other important aspects were implemented - like THD, attack/release compared to the original, etc. Native Instruments did a Pro-52, Pro-53 some time ago, too. "What's in a name? That which we call a rose By any other name would smell as sweet."

fuseaudiolabs wrote:RPH, you'd observe heavier figures with the VCL-4 if you left the compressor at a neutral state and cranked the makeup amplifier all the way, basically hard clipping the audio. Mind you, the original unit wouldn't sound good in this out of spec. region, either, minus the aliasing of course..it's simply not what it's supposed to do - it's a compressor after all, not a saturator.Conclusion: Watch the UI's overload LED and you'll be fine .

Hi Ray,

Thanks for your elaborate comment.For realtime usage I would never crank up the makeup towards 10, within recommended spec the compressor works great.Think my measurements support what you said exactly, use higher samplerate when pushing the compressor above recommended spec.Within it's definitely not needed, at 44.1 kHz it behaves beautifully and at very low CPU usage.

While reading some information about the original unit noticed what I was testing was not compressing, but limiting, as I set the ratio up to 20.So, I hope nobody uses the measurements to conclude anything.

The sweet spot for me is at ratio 4 and threshold 5 or 6, output level set to about 6 or close to 7.Of course all depending on the input source and level.

Question:The (original) compressor has variable attack and release, I could not find information about that on your site.Could you tell us more about what the min and max values are to be expected, and does the ratio have some influence on that?

RPH wrote:Question:The (original) compressor has variable attack and release, I could not find information about that on your site.Could you tell us more about what the min and max values are to be expected, and does the ratio have some influence on that?

The original LA-4 manual says that attack should be 1-10 ms, release 100 ms - 1 sec, and the 2:1 ratio has a lower threshold than the other ones.

I am not completely sure how ratios correlate to attack and release values, maybe Ray could say something about it.

fuseaudiolabs wrote:RPH, you'd observe heavier figures with the VCL-4 if you left the compressor at a neutral state and cranked the makeup amplifier all the way, basically hard clipping the audio. Mind you, the original unit wouldn't sound good in this out of spec. region, either, minus the aliasing of course..it's simply not what it's supposed to do - it's a compressor after all, not a saturator.Conclusion: Watch the UI's overload LED and you'll be fine .

Hi Ray,

Thanks for your elaborate comment.For realtime usage I would never crank up the makeup towards 10, within recommended spec the compressor works great.Think my measurements support what you said exactly, use higher samplerate when pushing the compressor above recommended spec.Within it's definitely not needed, at 44.1 kHz it behaves beautifully and at very low CPU usage.

While reading some information about the original unit noticed what I was testing was not compressing, but limiting, as I set the ratio up to 20.So, I hope nobody uses the measurements to conclude anything.

The sweet spot for me is at ratio 4 and threshold 5 or 6, output level set to about 6 or close to 7.Of course all depending on the input source and level.

Question:The (original) compressor has variable attack and release, I could not find information about that on your site.Could you tell us more about what the min and max values are to be expected, and does the ratio have some influence on that?

Sincerely,

Rob.

Hey Rob,

Thanks for your comments.

Unfortunately there is no simple and universal answer to your question. Program dependent behavior is something that's intrinsic to the photo resistors that are used in an opto compressor's gain cell. The fundamental effect that's going on here is that higher excitation of a photo resistor yields decreased response times, which is especially pronounced in the recovery/release phase. I give a brief discussion and some measurements on that topic on Igor's blog: http://nc-rec.com/blog/fuse-audio-labs-vcl-4/.While the figures presented in the HW manual - as quoted by lesha - give a rough outline of the attack/release time range that is also met by the emulation you can generally expect shorter response times when more compression is going on. To answer your question on the influence of the ratio setting, higher ratios = shorter attack/release = overall more aggressive behavior when processing the same signal at the same threshold setting (bluntly put). The same also goes for higher threshold settings when processing the same audio at a fixed ratio setting.I'm afraid I can't give you a more in-depth answer or more detailed measurements now, as I'm very busy preparing two new releases right now. It's also recommended to check the plugin manual as it contains some technical insights and measurements into/of the emulation.I'll try to put up some burst measurements at a later date, but I hope the above answers are sufficient for now

Nice that there's no incredibly stupid faux reflection on the VU "glass".

Bad that there is unnecessary skewing of the knobs. And the whole GUI is so big, with only two knobs that have dual-function? Talking of stupid design decisions. Only to look more hardware like.

I wouldn't mind it look like an Airwindows plugin [no GUI at all], for as long as it is resizeable and all the 4 controls are easily accessible. I thought people would start to develop vectorised GUIs, finally, at this point. It is very necessary because some people use small monitors and some use 4k monitors. You can't expect everyone to use the same size GUI.

I also thought devs finally got over that whole 1:1 hardware lookalike BS. UA is not using 1:1, IKM is not using 1:1 stupid fish eye GUIs, u-he, Toneboosters and Cytomic... Some rare Waves plugins are using it, but generally it's a no-no. Just stop it. Screws in the gui?? It's not 2009 any more.

When I see a faux 3D GUI these days it makes me think the dev is trying to sell a hardware lookalike GUI with a generic DSP. In other words, he is trying to sell a GUI design that has nothing to do with the sound.

Sound? This one sounds really nice and transparent. Just the way a compressor should sound like. It's a steal for the money. I'm siding with those who say that a nice oversampling algo should be available with an on/off switch, though. Many people like to have HQ options like that, so why not providing them with those? It's just a little on/off switch. You want to say there is not enough space for it there?

But the GUI... same with BRA plugins. Too big for only a couple of controls, trying to look like hardware and its functionality suffers. We are working in a DAW, on a computer and we need controls easily accessable. We need to work fast and see all the controls clearly. We shouldn't waste time on trying to find a control knob in a 4 knob control plugin. Try designing a synth with 166 control knobs, pots and sliders and see how far this philosophy will take you.

Maybe talk to Urs about "Industrial Design"?

Who gives a rotten banana about a plugin looking like hardware? Look up Fabfilter plugins and other pro plugins I mentioned. Persisting on this fisheye looking nonsense with 1:1 hard to use hardware controls is ridiculous. Stop the nonsense.

But yes - sound is the most important and the compression algo in this one works beautifully.

Cheers!

It is no measure of health to be well adjusted to a profoundly sick society.

DuX wrote:Nice that there's no incredibly stupid faux reflection on the VU "glass".

Bad that there is unnecessary skewing of the knobs. And the whole GUI is so big, with only two knobs that have dual-function? Talking of stupid design decisions. Only to look more hardware like.

I wouldn't mind it look like an Airwindows plugin [no GUI at all], for as long as it is resizeable and all the 4 controls are easily accessible. I thought people would start to develop vectorised GUIs, finally, at this point. It is very necessary because some people use small monitors and some use 4k monitors. You can't expect everyone to use the same size GUI.

I also thought devs finally got over that whole 1:1 hardware lookalike BS. UA is not using 1:1, IKM is not using 1:1 stupid fish eye GUIs, u-he, Toneboosters and Cytomic... Some rare Waves plugins are using it, but generally it's a no-no. Just stop it. Screws in the gui?? It's not 2009 any more.

When I see a faux 3D GUI these days it makes me think the dev is trying to sell a hardware lookalike GUI with a generic DSP. In other words, he is trying to sell a GUI design that has nothing to do with the sound.

Sound? This one sounds really nice and transparent. Just the way a compressor should sound like. It's a steal for the money. I'm siding with those who say that a nice oversampling algo should be available with an on/off switch, though. Many people like to have HQ options like that, so why not providing them with those? It's just a little on/off switch. You want to say there is not enough space for it there?

But the GUI... same with BRA plugins. Too big for only a couple of controls, trying to look like hardware and its functionality suffers. We are working in a DAW, on a computer and we need controls easily accessable. We need to work fast and see all the controls clearly. We shouldn't waste time on trying to find a control knob in a 4 knob control plugin. Try designing a synth with 166 control knobs, pots and sliders and see how far this philosophy will take you.

Maybe talk to Urs about "Industrial Design"?

Who gives a rotten banana about a plugin looking like hardware? Look up Fabfilter plugins and other pro plugins I mentioned. Persisting on this fisheye looking nonsense with 1:1 hard to use hardware controls is ridiculous. Stop the nonsense.

But yes - sound is the most important and the compression algo in this one works beautifully.

Cheers!

Hi DuX,

Thanks for your comments. The idea of making a GUI look like or similar to the original HW also has to do with paying homage to that unit. I get your point though and there might be different plugins in the future (not analog emulations) where a vectorized GUI would be more suitable...from a "vibe-standpoint" I mean. I also get the practical aspect of it, it's funny though that most customers have complained about the GUI being too small. You're the first one who finds it too big. The only recommendation I can give in your case for now: Select a smaller GUI size from the drop-down menu in the toolbar (goes for both the Rooster as well as the Fuse plugs).

just picked this up, finally.I'm starting to feel it out, but haven't been using it for long....anyone have any tips in regard to controlling the attack and release?I've been upping the ratio to max, and lifting the threshold. I guess that's about the extent of it?

sqigls wrote:just picked this up, finally.I'm starting to feel it out, but haven't been using it for long....anyone have any tips in regard to controlling the attack and release?I've been upping the ratio to max, and lifting the threshold. I guess that's about the extent of it?

Would be ultra handy to have a dry/wet control.

It's completely program dependant so there's no physical control over attack and release. It's an excellent compressor and can really sit things in their place, one of my favourites.

sqigls wrote:just picked this up, finally.I'm starting to feel it out, but haven't been using it for long....anyone have any tips in regard to controlling the attack and release?I've been upping the ratio to max, and lifting the threshold. I guess that's about the extent of it?

Would be ultra handy to have a dry/wet control.

It's completely program dependant so there's no physical control over attack and release. It's an excellent compressor and can really sit things in their place, one of my favourites.

A dry wet would be handy. Enjoy, it works great on plenty of sources!

yeah i get that, cheers

i'll rephrase what i said earlier... any tips to get the most out of it?push and stretch it to its limits...?

i'm loving the tight low-end.good on the drum buss too. great on most things